# CVE-2018-4836: Privilege escalation in TeleControl Server Basic

> An authenticated low-privileged attacker can escalate privileges to perform administrative operations on the TeleControl Server Basic.

- **Severity:** High 8.8 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 25 Jan 2018
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-25wc-vm27-vmmq

## What is CVE-2018-4836?

CVE-2018-4836 is a high-severity vulnerability in Siemens Telecontrol Server Basic, published on 25 Jan 2018. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability has been identified in TeleControl Server Basic < V3.1. An authenticated attacker with a low-privileged account to the TeleControl Server Basic's port 8000/tcp could escalate his privileges and perform administrative operations.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2018-4836?

It affects 1 product.


Products: Siemens Telecontrol Server Basic.

## How do I fix CVE-2018-4836?

No fix has been published for CVE-2018-4836 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-4836 being exploited?

There is no known exploitation of CVE-2018-4836 in the wild and no public exploit code.

## Other vulnerabilities in Siemens Telecontrol Server Basic

- [CVE-2024-44102](https://insights.sbomify.com/CVE-2024-44102/): Deserialization in PP TeleControl Server Basic 1000 to 5000 V3.1 (critical 10.0)
- [CVE-2025-40765](https://insights.sbomify.com/CVE-2025-40765/): Information disclosure in TeleControl Server Basic V3.1 (critical 9.3)
- [CVE-2025-27495](https://insights.sbomify.com/CVE-2025-27495/): SQL injection in TeleControl Server Basic (critical 9.3)
- [CVE-2025-27539](https://insights.sbomify.com/CVE-2025-27539/): SQL injection in TeleControl Server Basic (critical 9.3)
- [CVE-2025-27540](https://insights.sbomify.com/CVE-2025-27540/): SQL injection in TeleControl Server Basic (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-4836 and fix it if it is affected.

What it is: CVE-2018-4836 is a high-severity vulnerability in Siemens Telecontrol Server Basic, published on 25 Jan 2018. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-4836 in the wild and no public exploit code.

Affected product: Siemens Telecontrol Server Basic. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2018-4836/ (Markdown: https://insights.sbomify.com/CVE-2018-4836/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-4836
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-4836
- OSV: https://osv.dev/vulnerability/CVE-2018-4836

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-4836/
Summaries are generated and may contain mistakes; the official description above is the record.